private void Render(SetTagHelperProperty source, CSharpRenderingContext context)
{
var tagHelperVariableName = GetTagHelperVariableName(source.TagHelperTypeName);
var renderTagHelperContext = context.GetRenderTagHelperContext();
var propertyValueAccessor = GetTagHelperPropertyAccessor(tagHelperVariableName, source.AttributeName, source.AssociatedDescriptor);
string previousValueAccessor;
if (renderTagHelperContext.RenderedBoundAttributes.TryGetValue(source.AttributeName, out previousValueAccessor))
{
context.Writer
.WriteStartAssignment(propertyValueAccessor)
.Write(previousValueAccessor)
.WriteLine(";");
return;
}
else
{
renderTagHelperContext.RenderedBoundAttributes[source.AttributeName] = propertyValueAccessor;
}
if (source.AssociatedDescriptor.IsStringProperty)
{
context.Render(source.Value.Children);
}
else
{
var firstMappedChild = source.Value.Children.FirstOrDefault(child => child is ISourceMapped) as ISourceMapped;
var valueStart = firstMappedChild?.DocumentLocation;
using (context.Writer.BuildLinePragma(source.DocumentLocation))
using (context.Writer.NoIndent())
{
var assignmentPrefixLength = propertyValueAccessor.Length + " = ".Length;
if (source.AssociatedDescriptor.IsEnum &&
source.Value.Children.Count == 1 &&
source.Value.Children.First() is RenderHtml)
{
assignmentPrefixLength += $"global::{source.AssociatedDescriptor.TypeName}.".Length;
if (valueStart != null)
{
var padding = Math.Max(valueStart.CharacterIndex - assignmentPrefixLength, 0);
var paddingString = _paddingBuilder.BuildPaddingString(padding);
context.Writer.Write(paddingString);
}
context.Writer
.WriteStartAssignment(propertyValueAccessor)
.Write("global::")
.Write(source.AssociatedDescriptor.TypeName)
.Write(".");
}
else
{
if (valueStart != null)
{
var padding = Math.Max(valueStart.CharacterIndex - assignmentPrefixLength, 0);
var paddingString = _paddingBuilder.BuildPaddingString(padding);
context.Writer.Write(paddingString);
}
context.Writer.WriteStartAssignment(propertyValueAccessor);
}
RenderTagHelperAttributeInline(source.Value, source.DocumentLocation, context);
context.Writer.WriteLine(";");
}
}
}
private static void Render(SetTagHelperProperty source, CSharpRenderingContext context)
{
var tagHelperVariableName = GetTagHelperVariableName(source.TagHelperTypeName);
var renderTagHelperContext = context.GetRenderTagHelperContext();
// Ensure that the property we're trying to set has initialized its dictionary bound properties.
if (source.AssociatedDescriptor.IsIndexer &&
renderTagHelperContext.VerifiedPropertyDictionaries.Add(source.AssociatedDescriptor.PropertyName))
{
// Throw a reasonable Exception at runtime if the dictionary property is null.
context.Writer
.Write("if (")
.Write(tagHelperVariableName)
.Write(".")
.Write(source.AssociatedDescriptor.PropertyName)
.WriteLine(" == null)");
using (context.Writer.BuildScope())
{
// System is in Host.NamespaceImports for all MVC scenarios. No need to generate FullName
// of InvalidOperationException type.
context.Writer
.Write("throw ")
.WriteStartNewObject(nameof(InvalidOperationException))
.WriteStartMethodInvocation(context.CodeLiterals.GeneratedTagHelperContext.FormatInvalidIndexerAssignmentMethodName)
.WriteStringLiteral(source.AttributeName)
.WriteParameterSeparator()
.WriteStringLiteral(source.TagHelperTypeName)
.WriteParameterSeparator()
.WriteStringLiteral(source.AssociatedDescriptor.PropertyName)
.WriteEndMethodInvocation(endLine: false) // End of method call
.WriteEndMethodInvocation(); // End of new expression / throw statement
}
}
var propertyValueAccessor = GetTagHelperPropertyAccessor(tagHelperVariableName, source.AttributeName, source.AssociatedDescriptor);
string previousValueAccessor;
if (renderTagHelperContext.RenderedBoundAttributes.TryGetValue(source.AttributeName, out previousValueAccessor))
{
context.Writer
.WriteStartAssignment(propertyValueAccessor)
.Write(previousValueAccessor)
.WriteLine(";");
return;
}
else
{
renderTagHelperContext.RenderedBoundAttributes[source.AttributeName] = propertyValueAccessor;
}
if (source.AssociatedDescriptor.IsStringProperty)
{
context.Writer.WriteMethodInvocation(context.CodeLiterals.GeneratedTagHelperContext.BeginWriteTagHelperAttributeMethodName);
var renderingConventions = new CSharpLiteralCodeConventions(context);
using (context.UseRenderingConventions(renderingConventions))
{
context.Render(source.Value.Children);
}
context.Writer
.WriteStartAssignment(StringValueBufferVariableName)
.WriteMethodInvocation(context.CodeLiterals.GeneratedTagHelperContext.EndWriteTagHelperAttributeMethodName)
.WriteStartAssignment(propertyValueAccessor)
.Write(StringValueBufferVariableName)
.WriteLine(";");
}
else
{
using (context.Writer.BuildLinePragma(source.DocumentLocation))
{
context.Writer.WriteStartAssignment(propertyValueAccessor);
if (source.AssociatedDescriptor.IsEnum &&
source.Value.Children.Count == 1 &&
source.Value.Children.First() is RenderHtml)
{
context.Writer
.Write("global::")
.Write(source.AssociatedDescriptor.TypeName)
.Write(".");
}
RenderTagHelperAttributeInline(source.Value, source.DocumentLocation, context);
context.Writer.WriteLine(";");
}
}
// We need to inform the context of the attribute value.
context.Writer
.WriteStartInstanceMethodInvocation(
ExecutionContextVariableName,
context.CodeLiterals.GeneratedTagHelperContext.ExecutionContextAddTagHelperAttributeMethodName)
.WriteStringLiteral(source.AttributeName)
.WriteParameterSeparator()
.Write(propertyValueAccessor)
.WriteParameterSeparator()
.Write($"global::{typeof(HtmlAttributeValueStyle).FullName}.{source.ValueStyle}")
.WriteEndMethodInvocation();
}
